[1]张佳颖,刘心怡,周俊才,等.乳酸钠和乙酸钠作为碳源对生物脱氮的影响[J].中国给水排水,2023,39(19):83-88.
　ZHANGJia-ying,LIUXin-yi,ZHOUJun-cai,et al.Effect of Sodium Lactate and Sodium Acetate as Carbon Sources on Biological Nitrogen Removal[J].China Water & Wastewater,2023,39(19):83-88.
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乳酸钠和乙酸钠作为碳源对生物脱氮的影响

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第39卷 期数: 2023年第19期 页码: 83-88 栏目: 出版日期: 2023-10-01
Title:
Effect of Sodium Lactate and Sodium Acetate as Carbon Sources on Biological Nitrogen Removal
作者:
张佳颖1， 刘心怡1， 周俊才1， 孟雯1， 李晓玲1,2， 高明3， 汪群慧3
（1.长安大学 建筑工程学院，陕西 西安 710061；2.长安大学 住建部给水排水重点实验室，陕西 西安 710054；3.北京科技大学 能源与环境工程学院，北京 100083）
Author(s):
ZHANG　Jia-ying1， LIU　Xin-yi1， ZHOU　Jun-cai1， MENG　Wen1， LI　Xiao-ling1，2， GAO　Ming3， WANG　Qun-hui3
（1. School of Civil Engineering， Chang’an University， Xi’an 710061， China； 2. Key Laboratory of Water Supply and Drainage ， Chang’an University， Xi’an 710054， China； 3. School of Energy and Environmental Engineering， University of Science and Technology Beijing， Beijing 100083， China）
关键词:
乳酸钠;  乙酸钠;  碳源;  生物脱氮;  COD;  污泥膨胀
Keywords:
sodium lactate;  sodium acetate;  carbon source;  biological nitrogen removal;  COD;  sludge bulking
摘要:
基于SBR反应器，通过与传统碳源乙酸钠进行对比，探究人工配水条件下以乳酸钠作为碳源的脱氮效果以及生物可利用性等差异。结果表明，在进水NH4+-N为32 mg/L的条件下，当COD为200 mg/L时，乙酸钠的脱氮效果优于乳酸钠；当COD为300 mg/L时，乳酸钠和乙酸钠两种体系的总氮去除率相当，且均达到最高值，分别为85.73%和83.04%；当COD为400 mg/L时，乙酸钠对硝化过程的抑制作用明显，进而使得体系的总氮去除率较低，仅为56.51%，而乳酸钠体系的脱氮效果良好。运行过程中两种体系均出现了污泥膨胀现象，且乳酸钠体系膨胀更明显，同时随着COD浓度的增加，膨胀现象加剧并伴有污泥结块现象。两种体系中的微生物种类及占比相似，表明乳酸钠与乙酸钠作为碳源的脱氮效果良好，有相似的生物可利用性。在乳酸钠体系中，Ferruginibacter占比较高，说明乳酸钠作为外加碳源时污泥容易产生结块膨胀现象。
Abstract:
This study compared the differences of nitrogen removal performance and bioavailability between sodium lactate and traditional carbon source sodium acetate in a SBR for the treatment of simulated wastewater. When the influent NH4+-N and COD were 32 mg/L and 200 mg/L respectively, the nitrogen removal performance of sodium acetate was better than that of sodium lactate. When the COD was 300 mg/L, the total nitrogen removal rates of both systems were comparable and reached the highest values of 85.73% and 83.04% respectively. When the COD was 400 mg/L, sodium acetate obviously inhibited the nitrification process, resulting in the total nitrogen removal rate of the system as lower as 56.51%. Conversely, good denitrification performance of the sodium lactate system was obtained. Sludge bulking was observed in both systems during the operation, and the phenomenon was more pronounced in the sodium lactate system. With the increase of COD, the sludge bulking was aggravated and accompanied by sludge agglomeration. The microbial species and their relative abundance were comparable in the two systems, indicating that sodium lactate and sodium acetate as carbon sources had similar bioavailability and good nitrogen removal performances. In the sodium lactate system, Ferruginibacter accounted for a relatively high abundance, indicating that sludge agglomeration and bulking were prone to occur when sodium lactate was employed as the additional carbon sources.

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更新日期/Last Update: 2023-10-01